blob: 1a32d62ed86b6bb611b8cd625a790587ef6b5735 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (C) 1995-1996 Linus Torvalds & authors (see below)
3 */
4
5/*
6 * Original authors: abramov@cecmow.enet.dec.com (Igor Abramov)
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +02007 * mlord@pobox.com (Mark Lord)
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
9 * See linux/MAINTAINERS for address of current maintainer.
10 *
11 * This file provides support for the advanced features and bugs
12 * of IDE interfaces using the CMD Technologies 0640 IDE interface chip.
13 *
14 * These chips are basically fucked by design, and getting this driver
15 * to work on every motherboard design that uses this screwed chip seems
16 * bloody well impossible. However, we're still trying.
17 *
18 * Version 0.97 worked for everybody.
19 *
20 * User feedback is essential. Many thanks to the beta test team:
21 *
22 * A.Hartgers@stud.tue.nl, JZDQC@CUNYVM.CUNY.edu, abramov@cecmow.enet.dec.com,
23 * bardj@utopia.ppp.sn.no, bart@gaga.tue.nl, bbol001@cs.auckland.ac.nz,
24 * chrisc@dbass.demon.co.uk, dalecki@namu26.Num.Math.Uni-Goettingen.de,
25 * derekn@vw.ece.cmu.edu, florian@btp2x3.phy.uni-bayreuth.de,
26 * flynn@dei.unipd.it, gadio@netvision.net.il, godzilla@futuris.net,
27 * j@pobox.com, jkemp1@mises.uni-paderborn.de, jtoppe@hiwaay.net,
28 * kerouac@ssnet.com, meskes@informatik.rwth-aachen.de, hzoli@cs.elte.hu,
29 * peter@udgaard.isgtec.com, phil@tazenda.demon.co.uk, roadcapw@cfw.com,
30 * s0033las@sun10.vsz.bme.hu, schaffer@tam.cornell.edu, sjd@slip.net,
31 * steve@ei.org, ulrpeg@bigcomm.gun.de, ism@tardis.ed.ac.uk, mack@cray.com
32 * liug@mama.indstate.edu, and others.
33 *
34 * Version 0.01 Initial version, hacked out of ide.c,
35 * and #include'd rather than compiled separately.
36 * This will get cleaned up in a subsequent release.
37 *
38 * Version 0.02 Fixes for vlb initialization code, enable prefetch
39 * for versions 'B' and 'C' of chip by default,
40 * some code cleanup.
41 *
42 * Version 0.03 Added reset of secondary interface,
43 * and black list for devices which are not compatible
44 * with prefetch mode. Separate function for setting
45 * prefetch is added, possibly it will be called some
46 * day from ioctl processing code.
47 *
48 * Version 0.04 Now configs/compiles separate from ide.c
49 *
50 * Version 0.05 Major rewrite of interface timing code.
51 * Added new function cmd640_set_mode to set PIO mode
52 * from ioctl call. New drives added to black list.
53 *
54 * Version 0.06 More code cleanup. Prefetch is enabled only for
55 * detected hard drives, not included in prefetch
56 * black list.
57 *
58 * Version 0.07 Changed to more conservative drive tuning policy.
59 * Unknown drives, which report PIO < 4 are set to
60 * (reported_PIO - 1) if it is supported, or to PIO0.
61 * List of known drives extended by info provided by
62 * CMD at their ftp site.
63 *
64 * Version 0.08 Added autotune/noautotune support.
65 *
66 * Version 0.09 Try to be smarter about 2nd port enabling.
67 * Version 0.10 Be nice and don't reset 2nd port.
68 * Version 0.11 Try to handle more weird situations.
69 *
70 * Version 0.12 Lots of bug fixes from Laszlo Peter
71 * irq unmasking disabled for reliability.
72 * try to be even smarter about the second port.
73 * tidy up source code formatting.
74 * Version 0.13 permit irq unmasking again.
75 * Version 0.90 massive code cleanup, some bugs fixed.
76 * defaults all drives to PIO mode0, prefetch off.
77 * autotune is OFF by default, with compile time flag.
78 * prefetch can be turned OFF/ON using "hdparm -p8/-p9"
79 * (requires hdparm-3.1 or newer)
80 * Version 0.91 first release to linux-kernel list.
81 * Version 0.92 move initial reg dump to separate callable function
82 * change "readahead" to "prefetch" to avoid confusion
83 * Version 0.95 respect original BIOS timings unless autotuning.
84 * tons of code cleanup and rearrangement.
85 * added CONFIG_BLK_DEV_CMD640_ENHANCED option
86 * prevent use of unmask when prefetch is on
87 * Version 0.96 prevent use of io_32bit when prefetch is off
88 * Version 0.97 fix VLB secondary interface for sjd@slip.net
89 * other minor tune-ups: 0.96 was very good.
90 * Version 0.98 ignore PCI version when disabled by BIOS
91 * Version 0.99 display setup/active/recovery clocks with PIO mode
92 * Version 1.00 Mmm.. cannot depend on PCMD_ENA in all systems
93 * Version 1.01 slow/fast devsel can be selected with "hdparm -p6/-p7"
94 * ("fast" is necessary for 32bit I/O in some systems)
95 * Version 1.02 fix bug that resulted in slow "setup times"
96 * (patch courtesy of Zoltan Hidvegi)
97 */
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#define CMD640_PREFETCH_MASKS 1
100
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200101/*#define CMD640_DUMP_REGS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#include <linux/types.h>
104#include <linux/kernel.h>
105#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106#include <linux/ide.h>
107#include <linux/init.h>
108
109#include <asm/io.h>
110
Bartlomiej Zolnierkiewicz7ebe5932008-04-26 22:25:19 +0200111#define DRV_NAME "cmd640"
112
Bartlomiej Zolnierkiewiczef87f8d2008-04-27 15:38:24 +0200113static int cmd640_vlb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115/*
116 * CMD640 specific registers definition.
117 */
118
119#define VID 0x00
120#define DID 0x02
121#define PCMD 0x04
122#define PCMD_ENA 0x01
123#define PSTTS 0x06
124#define REVID 0x08
125#define PROGIF 0x09
126#define SUBCL 0x0a
127#define BASCL 0x0b
128#define BaseA0 0x10
129#define BaseA1 0x14
130#define BaseA2 0x18
131#define BaseA3 0x1c
132#define INTLINE 0x3c
133#define INPINE 0x3d
134
135#define CFR 0x50
136#define CFR_DEVREV 0x03
137#define CFR_IDE01INTR 0x04
138#define CFR_DEVID 0x18
139#define CFR_AT_VESA_078h 0x20
140#define CFR_DSA1 0x40
141#define CFR_DSA0 0x80
142
143#define CNTRL 0x51
144#define CNTRL_DIS_RA0 0x40
145#define CNTRL_DIS_RA1 0x80
146#define CNTRL_ENA_2ND 0x08
147
148#define CMDTIM 0x52
149#define ARTTIM0 0x53
150#define DRWTIM0 0x54
151#define ARTTIM1 0x55
152#define DRWTIM1 0x56
153#define ARTTIM23 0x57
154#define ARTTIM23_DIS_RA2 0x04
155#define ARTTIM23_DIS_RA3 0x08
Sergei Shtylyov87441db2009-06-15 18:52:58 +0200156#define ARTTIM23_IDE23INTR 0x10
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157#define DRWTIM23 0x58
158#define BRST 0x59
159
160/*
161 * Registers and masks for easy access by drive index:
162 */
163static u8 prefetch_regs[4] = {CNTRL, CNTRL, ARTTIM23, ARTTIM23};
164static u8 prefetch_masks[4] = {CNTRL_DIS_RA0, CNTRL_DIS_RA1, ARTTIM23_DIS_RA2, ARTTIM23_DIS_RA3};
165
166#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
167
168static u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
169static u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM23, DRWTIM23};
170
171/*
172 * Current cmd640 timing values for each drive.
173 * The defaults for each are the slowest possible timings.
174 */
175static u8 setup_counts[4] = {4, 4, 4, 4}; /* Address setup count (in clocks) */
176static u8 active_counts[4] = {16, 16, 16, 16}; /* Active count (encoded) */
177static u8 recovery_counts[4] = {16, 16, 16, 16}; /* Recovery count (encoded) */
178
179#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
180
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200181static DEFINE_SPINLOCK(cmd640_lock);
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 * Interface to access cmd640x registers
185 */
186static unsigned int cmd640_key;
187static void (*__put_cmd640_reg)(u16 reg, u8 val);
188static u8 (*__get_cmd640_reg)(u16 reg);
189
190/*
191 * This is read from the CFR reg, and is used in several places.
192 */
193static unsigned int cmd640_chip_version;
194
195/*
196 * The CMD640x chip does not support DWORD config write cycles, but some
197 * of the BIOSes use them to implement the config services.
198 * Therefore, we must use direct IO instead.
199 */
200
201/* PCI method 1 access */
202
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200203static void put_cmd640_reg_pci1(u16 reg, u8 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
205 outl_p((reg & 0xfc) | cmd640_key, 0xcf8);
206 outb_p(val, (reg & 3) | 0xcfc);
207}
208
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200209static u8 get_cmd640_reg_pci1(u16 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
211 outl_p((reg & 0xfc) | cmd640_key, 0xcf8);
212 return inb_p((reg & 3) | 0xcfc);
213}
214
215/* PCI method 2 access (from CMD datasheet) */
216
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200217static void put_cmd640_reg_pci2(u16 reg, u8 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
219 outb_p(0x10, 0xcf8);
220 outb_p(val, cmd640_key + reg);
221 outb_p(0, 0xcf8);
222}
223
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200224static u8 get_cmd640_reg_pci2(u16 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225{
226 u8 b;
227
228 outb_p(0x10, 0xcf8);
229 b = inb_p(cmd640_key + reg);
230 outb_p(0, 0xcf8);
231 return b;
232}
233
234/* VLB access */
235
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200236static void put_cmd640_reg_vlb(u16 reg, u8 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
238 outb_p(reg, cmd640_key);
239 outb_p(val, cmd640_key + 4);
240}
241
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200242static u8 get_cmd640_reg_vlb(u16 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
244 outb_p(reg, cmd640_key);
245 return inb_p(cmd640_key + 4);
246}
247
248static u8 get_cmd640_reg(u16 reg)
249{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 unsigned long flags;
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200251 u8 b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200253 spin_lock_irqsave(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 b = __get_cmd640_reg(reg);
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200255 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 return b;
257}
258
259static void put_cmd640_reg(u16 reg, u8 val)
260{
261 unsigned long flags;
262
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200263 spin_lock_irqsave(&cmd640_lock, flags);
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200264 __put_cmd640_reg(reg, val);
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200265 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266}
267
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200268static int __init match_pci_cmd640_device(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
270 const u8 ven_dev[4] = {0x95, 0x10, 0x40, 0x06};
271 unsigned int i;
272 for (i = 0; i < 4; i++) {
273 if (get_cmd640_reg(i) != ven_dev[i])
274 return 0;
275 }
276#ifdef STUPIDLY_TRUST_BROKEN_PCMD_ENA_BIT
277 if ((get_cmd640_reg(PCMD) & PCMD_ENA) == 0) {
278 printk("ide: cmd640 on PCI disabled by BIOS\n");
279 return 0;
280 }
281#endif /* STUPIDLY_TRUST_BROKEN_PCMD_ENA_BIT */
282 return 1; /* success */
283}
284
285/*
286 * Probe for CMD640x -- pci method 1
287 */
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200288static int __init probe_for_cmd640_pci1(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
290 __get_cmd640_reg = get_cmd640_reg_pci1;
291 __put_cmd640_reg = put_cmd640_reg_pci1;
292 for (cmd640_key = 0x80000000;
293 cmd640_key <= 0x8000f800;
294 cmd640_key += 0x800) {
295 if (match_pci_cmd640_device())
296 return 1; /* success */
297 }
298 return 0;
299}
300
301/*
302 * Probe for CMD640x -- pci method 2
303 */
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200304static int __init probe_for_cmd640_pci2(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305{
306 __get_cmd640_reg = get_cmd640_reg_pci2;
307 __put_cmd640_reg = put_cmd640_reg_pci2;
308 for (cmd640_key = 0xc000; cmd640_key <= 0xcf00; cmd640_key += 0x100) {
309 if (match_pci_cmd640_device())
310 return 1; /* success */
311 }
312 return 0;
313}
314
315/*
316 * Probe for CMD640x -- vlb
317 */
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200318static int __init probe_for_cmd640_vlb(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319{
320 u8 b;
321
322 __get_cmd640_reg = get_cmd640_reg_vlb;
323 __put_cmd640_reg = put_cmd640_reg_vlb;
324 cmd640_key = 0x178;
325 b = get_cmd640_reg(CFR);
326 if (b == 0xff || b == 0x00 || (b & CFR_AT_VESA_078h)) {
327 cmd640_key = 0x78;
328 b = get_cmd640_reg(CFR);
329 if (b == 0xff || b == 0x00 || !(b & CFR_AT_VESA_078h))
330 return 0;
331 }
332 return 1; /* success */
333}
334
335/*
336 * Returns 1 if an IDE interface/drive exists at 0x170,
337 * Returns 0 otherwise.
338 */
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200339static int __init secondary_port_responding(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340{
341 unsigned long flags;
342
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200343 spin_lock_irqsave(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200345 outb_p(0x0a, 0x176); /* select drive0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 udelay(100);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200347 if ((inb_p(0x176) & 0x1f) != 0x0a) {
348 outb_p(0x1a, 0x176); /* select drive1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 udelay(100);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200350 if ((inb_p(0x176) & 0x1f) != 0x1a) {
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200351 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 return 0; /* nothing responded */
353 }
354 }
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200355 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 return 1; /* success */
357}
358
359#ifdef CMD640_DUMP_REGS
360/*
361 * Dump out all cmd640 registers. May be called from ide.c
362 */
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200363static void cmd640_dump_regs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364{
365 unsigned int reg = cmd640_vlb ? 0x50 : 0x00;
366
367 /* Dump current state of chip registers */
368 printk("ide: cmd640 internal register dump:");
369 for (; reg <= 0x59; reg++) {
370 if (!(reg & 0x0f))
371 printk("\n%04x:", reg);
372 printk(" %02x", get_cmd640_reg(reg));
373 }
374 printk("\n");
375}
376#endif
377
Bartlomiej Zolnierkiewiczaf5dfe82008-10-10 22:39:28 +0200378static void __set_prefetch_mode(ide_drive_t *drive, int mode)
379{
380 if (mode) { /* want prefetch on? */
381#if CMD640_PREFETCH_MASKS
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200382 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
383 drive->dev_flags &= ~IDE_DFLAG_UNMASK;
Bartlomiej Zolnierkiewiczaf5dfe82008-10-10 22:39:28 +0200384#endif
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200385 drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT;
Bartlomiej Zolnierkiewiczaf5dfe82008-10-10 22:39:28 +0200386 } else {
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200387 drive->dev_flags &= ~IDE_DFLAG_NO_UNMASK;
388 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
Bartlomiej Zolnierkiewiczaf5dfe82008-10-10 22:39:28 +0200389 drive->io_32bit = 0;
390 }
391}
392
Bartlomiej Zolnierkiewiczbdffe5d2008-04-27 15:38:29 +0200393#ifndef CONFIG_BLK_DEV_CMD640_ENHANCED
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394/*
395 * Check whether prefetch is on for a drive,
396 * and initialize the unmask flags for safe operation.
397 */
Bartlomiej Zolnierkiewicz95230762008-04-26 17:36:33 +0200398static void __init check_prefetch(ide_drive_t *drive, unsigned int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 u8 b = get_cmd640_reg(prefetch_regs[index]);
401
Bartlomiej Zolnierkiewiczaf5dfe82008-10-10 22:39:28 +0200402 __set_prefetch_mode(drive, (b & prefetch_masks[index]) ? 0 : 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
Bartlomiej Zolnierkiewiczbdffe5d2008-04-27 15:38:29 +0200404#else
Bartlomiej Zolnierkiewiczaf5dfe82008-10-10 22:39:28 +0200405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406/*
407 * Sets prefetch mode for a drive.
408 */
Bartlomiej Zolnierkiewicz95230762008-04-26 17:36:33 +0200409static void set_prefetch_mode(ide_drive_t *drive, unsigned int index, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200411 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 int reg = prefetch_regs[index];
413 u8 b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200415 spin_lock_irqsave(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 b = __get_cmd640_reg(reg);
Bartlomiej Zolnierkiewiczaf5dfe82008-10-10 22:39:28 +0200417 __set_prefetch_mode(drive, mode);
418 if (mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 b &= ~prefetch_masks[index]; /* enable prefetch */
Bartlomiej Zolnierkiewiczaf5dfe82008-10-10 22:39:28 +0200420 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 b |= prefetch_masks[index]; /* disable prefetch */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 __put_cmd640_reg(reg, b);
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200423 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424}
425
426/*
427 * Dump out current drive clocks settings
428 */
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200429static void display_clocks(unsigned int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430{
431 u8 active_count, recovery_count;
432
433 active_count = active_counts[index];
434 if (active_count == 1)
435 ++active_count;
436 recovery_count = recovery_counts[index];
437 if (active_count > 3 && recovery_count == 1)
438 ++recovery_count;
439 if (cmd640_chip_version > 1)
440 recovery_count += 1; /* cmd640b uses (count + 1)*/
441 printk(", clocks=%d/%d/%d\n", setup_counts[index], active_count, recovery_count);
442}
443
444/*
445 * Pack active and recovery counts into single byte representation
446 * used by controller
447 */
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200448static inline u8 pack_nibbles(u8 upper, u8 lower)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
450 return ((upper & 0x0f) << 4) | (lower & 0x0f);
451}
452
453/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 * This routine writes the prepared setup/active/recovery counts
455 * for a drive into the cmd640 chipset registers to active them.
456 */
Bartlomiej Zolnierkiewicz95230762008-04-26 17:36:33 +0200457static void program_drive_counts(ide_drive_t *drive, unsigned int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458{
459 unsigned long flags;
460 u8 setup_count = setup_counts[index];
461 u8 active_count = active_counts[index];
462 u8 recovery_count = recovery_counts[index];
463
464 /*
465 * Set up address setup count and drive read/write timing registers.
466 * Primary interface has individual count/timing registers for
467 * each drive. Secondary interface has one common set of registers,
468 * so we merge the timings, using the slowest value for each timing.
469 */
470 if (index > 1) {
Bartlomiej Zolnierkiewicz2b78ff52009-01-06 17:20:55 +0100471 ide_drive_t *peer = ide_get_pair_dev(drive);
Bartlomiej Zolnierkiewicz95230762008-04-26 17:36:33 +0200472 unsigned int mate = index ^ 1;
473
Bartlomiej Zolnierkiewicz2b78ff52009-01-06 17:20:55 +0100474 if (peer) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 if (setup_count < setup_counts[mate])
476 setup_count = setup_counts[mate];
477 if (active_count < active_counts[mate])
478 active_count = active_counts[mate];
479 if (recovery_count < recovery_counts[mate])
480 recovery_count = recovery_counts[mate];
481 }
482 }
483
484 /*
485 * Convert setup_count to internal chipset representation
486 */
487 switch (setup_count) {
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200488 case 4: setup_count = 0x00; break;
489 case 3: setup_count = 0x80; break;
490 case 1:
491 case 2: setup_count = 0x40; break;
492 default: setup_count = 0xc0; /* case 5 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 }
494
495 /*
496 * Now that everything is ready, program the new timings
497 */
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200498 spin_lock_irqsave(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 /*
500 * Program the address_setup clocks into ARTTIM reg,
501 * and then the active/recovery counts into the DRWTIM reg
502 * (this converts counts of 16 into counts of zero -- okay).
503 */
504 setup_count |= __get_cmd640_reg(arttim_regs[index]) & 0x3f;
505 __put_cmd640_reg(arttim_regs[index], setup_count);
506 __put_cmd640_reg(drwtim_regs[index], pack_nibbles(active_count, recovery_count));
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200507 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508}
509
510/*
511 * Set a specific pio_mode for a drive
512 */
Bartlomiej Zolnierkiewicz95230762008-04-26 17:36:33 +0200513static void cmd640_set_mode(ide_drive_t *drive, unsigned int index,
514 u8 pio_mode, unsigned int cycle_time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515{
Bartlomiej Zolnierkiewicz17b500d2008-07-16 20:33:38 +0200516 struct ide_timing *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 int setup_time, active_time, recovery_time, clock_time;
518 u8 setup_count, active_count, recovery_count, recovery_count2, cycle_count;
Bartlomiej Zolnierkiewiczebae41a2008-04-27 15:38:29 +0200519 int bus_speed;
520
Bartlomiej Zolnierkiewicz30e5ee42008-07-15 21:21:46 +0200521 if (cmd640_vlb)
522 bus_speed = ide_vlb_clk ? ide_vlb_clk : 50;
Bartlomiej Zolnierkiewiczebae41a2008-04-27 15:38:29 +0200523 else
Bartlomiej Zolnierkiewicz30e5ee42008-07-15 21:21:46 +0200524 bus_speed = ide_pci_clk ? ide_pci_clk : 33;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
526 if (pio_mode > 5)
527 pio_mode = 5;
Bartlomiej Zolnierkiewicz17b500d2008-07-16 20:33:38 +0200528
529 t = ide_timing_find_mode(XFER_PIO_0 + pio_mode);
530 setup_time = t->setup;
531 active_time = t->active;
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 recovery_time = cycle_time - (setup_time + active_time);
534 clock_time = 1000 / bus_speed;
Julia Lawall00fe8b72008-04-26 17:36:35 +0200535 cycle_count = DIV_ROUND_UP(cycle_time, clock_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
Julia Lawall00fe8b72008-04-26 17:36:35 +0200537 setup_count = DIV_ROUND_UP(setup_time, clock_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
Julia Lawall00fe8b72008-04-26 17:36:35 +0200539 active_count = DIV_ROUND_UP(active_time, clock_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 if (active_count < 2)
541 active_count = 2; /* minimum allowed by cmd640 */
542
Julia Lawall00fe8b72008-04-26 17:36:35 +0200543 recovery_count = DIV_ROUND_UP(recovery_time, clock_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 recovery_count2 = cycle_count - (setup_count + active_count);
545 if (recovery_count2 > recovery_count)
546 recovery_count = recovery_count2;
547 if (recovery_count < 2)
548 recovery_count = 2; /* minimum allowed by cmd640 */
549 if (recovery_count > 17) {
550 active_count += recovery_count - 17;
551 recovery_count = 17;
552 }
553 if (active_count > 16)
554 active_count = 16; /* maximum allowed by cmd640 */
555 if (cmd640_chip_version > 1)
556 recovery_count -= 1; /* cmd640b uses (count + 1)*/
557 if (recovery_count > 16)
558 recovery_count = 16; /* maximum allowed by cmd640 */
559
560 setup_counts[index] = setup_count;
561 active_counts[index] = active_count;
562 recovery_counts[index] = recovery_count;
563
564 /*
565 * In a perfect world, we might set the drive pio mode here
566 * (using WIN_SETFEATURE) before continuing.
567 *
568 * But we do not, because:
569 * 1) this is the wrong place to do it (proper is do_special() in ide.c)
570 * 2) in practice this is rarely, if ever, necessary
571 */
Bartlomiej Zolnierkiewicz95230762008-04-26 17:36:33 +0200572 program_drive_counts(drive, index);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573}
574
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200575static void cmd640_set_pio_mode(ide_drive_t *drive, const u8 pio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576{
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200577 unsigned int index = 0, cycle_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 u8 b;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200580 switch (pio) {
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200581 case 6: /* set fast-devsel off */
582 case 7: /* set fast-devsel on */
583 b = get_cmd640_reg(CNTRL) & ~0x27;
584 if (pio & 1)
585 b |= 0x27;
586 put_cmd640_reg(CNTRL, b);
587 printk("%s: %sabled cmd640 fast host timing (devsel)\n",
588 drive->name, (pio & 1) ? "en" : "dis");
589 return;
590 case 8: /* set prefetch off */
591 case 9: /* set prefetch on */
592 set_prefetch_mode(drive, index, pio & 1);
593 printk("%s: %sabled cmd640 prefetch\n",
594 drive->name, (pio & 1) ? "en" : "dis");
595 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 }
597
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200598 cycle_time = ide_pio_cycle_time(drive, pio);
Bartlomiej Zolnierkiewicz95230762008-04-26 17:36:33 +0200599 cmd640_set_mode(drive, index, pio, cycle_time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
Bartlomiej Zolnierkiewicz342cdb62007-07-20 01:11:55 +0200601 printk("%s: selected cmd640 PIO mode%d (%dns)",
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200602 drive->name, pio, cycle_time);
Bartlomiej Zolnierkiewicz342cdb62007-07-20 01:11:55 +0200603
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 display_clocks(index);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605}
Bartlomiej Zolnierkiewiczb48c89a2008-07-16 20:33:42 +0200606#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
607
608static void cmd640_init_dev(ide_drive_t *drive)
609{
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200610 unsigned int i = drive->hwif->channel * 2 + (drive->dn & 1);
Bartlomiej Zolnierkiewiczb48c89a2008-07-16 20:33:42 +0200611
612#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
613 /*
614 * Reset timing to the slowest speed and turn off prefetch.
615 * This way, the drive identify code has a better chance.
616 */
617 setup_counts[i] = 4; /* max possible */
618 active_counts[i] = 16; /* max possible */
619 recovery_counts[i] = 16; /* max possible */
620 program_drive_counts(drive, i);
621 set_prefetch_mode(drive, i, 0);
622 printk(KERN_INFO DRV_NAME ": drive%d timings/prefetch cleared\n", i);
623#else
624 /*
625 * Set the drive unmask flags to match the prefetch setting.
626 */
627 check_prefetch(drive, i);
628 printk(KERN_INFO DRV_NAME ": drive%d timings/prefetch(%s) preserved\n",
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200629 i, (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT) ? "off" : "on");
Bartlomiej Zolnierkiewiczb48c89a2008-07-16 20:33:42 +0200630#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
631}
632
Sergei Shtylyov87441db2009-06-15 18:52:58 +0200633static int cmd640_test_irq(ide_hwif_t *hwif)
634{
635 struct pci_dev *dev = to_pci_dev(hwif->dev);
636 int irq_reg = hwif->channel ? ARTTIM23 : CFR;
637 u8 irq_stat, irq_mask = hwif->channel ? ARTTIM23_IDE23INTR :
638 CFR_IDE01INTR;
639
640 pci_read_config_byte(dev, irq_reg, &irq_stat);
641
642 return (irq_stat & irq_mask) ? 1 : 0;
643}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200645static const struct ide_port_ops cmd640_port_ops = {
Bartlomiej Zolnierkiewiczb48c89a2008-07-16 20:33:42 +0200646 .init_dev = cmd640_init_dev,
647#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200648 .set_pio_mode = cmd640_set_pio_mode,
Bartlomiej Zolnierkiewiczb48c89a2008-07-16 20:33:42 +0200649#endif
Sergei Shtylyov87441db2009-06-15 18:52:58 +0200650 .test_irq = cmd640_test_irq,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200651};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
653static int pci_conf1(void)
654{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 unsigned long flags;
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200656 u32 tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200658 spin_lock_irqsave(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 outb(0x01, 0xCFB);
660 tmp = inl(0xCF8);
661 outl(0x80000000, 0xCF8);
662 if (inl(0xCF8) == 0x80000000) {
663 outl(tmp, 0xCF8);
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200664 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 return 1;
666 }
667 outl(tmp, 0xCF8);
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200668 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 return 0;
670}
671
672static int pci_conf2(void)
673{
674 unsigned long flags;
675
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200676 spin_lock_irqsave(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 outb(0x00, 0xCFB);
678 outb(0x00, 0xCF8);
679 outb(0x00, 0xCFA);
680 if (inb(0xCF8) == 0x00 && inb(0xCF8) == 0x00) {
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200681 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 return 1;
683 }
Bartlomiej Zolnierkiewicz5bbcf922007-10-20 00:32:35 +0200684 spin_unlock_irqrestore(&cmd640_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 return 0;
686}
687
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100688static const struct ide_port_info cmd640_port_info __initdata = {
689 .chipset = ide_cmd640,
690 .host_flags = IDE_HFLAG_SERIALIZE |
691 IDE_HFLAG_NO_DMA |
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100692 IDE_HFLAG_ABUSE_PREFETCH |
693 IDE_HFLAG_ABUSE_FAST_DEVSEL,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200694 .port_ops = &cmd640_port_ops,
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100695 .pio_mask = ATA_PIO5,
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100696};
697
Bartlomiej Zolnierkiewicz7ebe5932008-04-26 22:25:19 +0200698static int cmd640x_init_one(unsigned long base, unsigned long ctl)
699{
700 if (!request_region(base, 8, DRV_NAME)) {
701 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
702 DRV_NAME, base, base + 7);
703 return -EBUSY;
704 }
705
706 if (!request_region(ctl, 1, DRV_NAME)) {
707 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
708 DRV_NAME, ctl);
709 release_region(base, 8);
710 return -EBUSY;
711 }
712
713 return 0;
714}
715
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716/*
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100717 * Probe for a cmd640 chipset, and initialize it if found.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 */
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100719static int __init cmd640x_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720{
Bartlomiej Zolnierkiewicz7ebe5932008-04-26 22:25:19 +0200721 int second_port_cmd640 = 0, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 const char *bus_type, *port2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 u8 b, cfr;
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +0200724 struct ide_hw hw[2], *hws[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
726 if (cmd640_vlb && probe_for_cmd640_vlb()) {
727 bus_type = "VLB";
728 } else {
729 cmd640_vlb = 0;
730 /* Find out what kind of PCI probing is supported otherwise
731 Justin Gibbs will sulk.. */
732 if (pci_conf1() && probe_for_cmd640_pci1())
733 bus_type = "PCI (type1)";
734 else if (pci_conf2() && probe_for_cmd640_pci2())
735 bus_type = "PCI (type2)";
736 else
737 return 0;
738 }
739 /*
740 * Undocumented magic (there is no 0x5b reg in specs)
741 */
742 put_cmd640_reg(0x5b, 0xbd);
743 if (get_cmd640_reg(0x5b) != 0xbd) {
744 printk(KERN_ERR "ide: cmd640 init failed: wrong value in reg 0x5b\n");
745 return 0;
746 }
747 put_cmd640_reg(0x5b, 0);
748
749#ifdef CMD640_DUMP_REGS
750 cmd640_dump_regs();
751#endif
752
753 /*
754 * Documented magic begins here
755 */
756 cfr = get_cmd640_reg(CFR);
757 cmd640_chip_version = cfr & CFR_DEVREV;
758 if (cmd640_chip_version == 0) {
Paolo Ciarrocchi4752b5e2008-04-26 17:36:41 +0200759 printk("ide: bad cmd640 revision: %d\n", cmd640_chip_version);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 return 0;
761 }
762
Bartlomiej Zolnierkiewicz7ebe5932008-04-26 22:25:19 +0200763 rc = cmd640x_init_one(0x1f0, 0x3f6);
764 if (rc)
765 return rc;
766
767 rc = cmd640x_init_one(0x170, 0x376);
768 if (rc) {
769 release_region(0x3f6, 1);
770 release_region(0x1f0, 8);
771 return rc;
772 }
773
Bartlomiej Zolnierkiewicz6d3803b2008-04-18 00:46:34 +0200774 memset(&hw, 0, sizeof(hw));
775
776 ide_std_init_ports(&hw[0], 0x1f0, 0x3f6);
777 hw[0].irq = 14;
778
779 ide_std_init_ports(&hw[1], 0x170, 0x376);
780 hw[1].irq = 15;
781
782 printk(KERN_INFO "cmd640: buggy cmd640%c interface on %s, config=0x%02x"
783 "\n", 'a' + cmd640_chip_version - 1, bus_type, cfr);
784
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 /*
786 * Initialize data for primary port
787 */
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +0200788 hws[0] = &hw[0];
Bartlomiej Zolnierkiewicz8ac4ce72008-01-26 20:13:06 +0100789
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 /*
791 * Ensure compatibility by always using the slowest timings
792 * for access to the drive's command register block,
793 * and reset the prefetch burstsize to default (512 bytes).
794 *
795 * Maybe we need a way to NOT do these on *some* systems?
796 */
797 put_cmd640_reg(CMDTIM, 0);
798 put_cmd640_reg(BRST, 0x40);
799
Bartlomiej Zolnierkiewicza6984002008-07-16 20:33:41 +0200800 b = get_cmd640_reg(CNTRL);
Bartlomiej Zolnierkiewicz84f05df2008-04-26 17:36:33 +0200801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 /*
803 * Try to enable the secondary interface, if not already enabled
804 */
Bartlomiej Zolnierkiewicza6984002008-07-16 20:33:41 +0200805 if (secondary_port_responding()) {
806 if ((b & CNTRL_ENA_2ND)) {
807 second_port_cmd640 = 1;
808 port2 = "okay";
809 } else if (cmd640_vlb) {
810 second_port_cmd640 = 1;
811 port2 = "alive";
812 } else
813 port2 = "not cmd640";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 } else {
Bartlomiej Zolnierkiewicza6984002008-07-16 20:33:41 +0200815 put_cmd640_reg(CNTRL, b ^ CNTRL_ENA_2ND); /* toggle the bit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 if (secondary_port_responding()) {
Bartlomiej Zolnierkiewicza6984002008-07-16 20:33:41 +0200817 second_port_cmd640 = 1;
818 port2 = "enabled";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 } else {
Bartlomiej Zolnierkiewicza6984002008-07-16 20:33:41 +0200820 put_cmd640_reg(CNTRL, b); /* restore original setting */
821 port2 = "not responding";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 }
823 }
824
825 /*
826 * Initialize data for secondary cmd640 port, if enabled
827 */
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +0200828 if (second_port_cmd640)
829 hws[1] = &hw[1];
830
Bartlomiej Zolnierkiewicz84f05df2008-04-26 17:36:33 +0200831 printk(KERN_INFO "cmd640: %sserialized, secondary interface %s\n",
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100832 second_port_cmd640 ? "" : "not ", port2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834#ifdef CMD640_DUMP_REGS
835 cmd640_dump_regs();
836#endif
Bartlomiej Zolnierkiewicz8ac4ce72008-01-26 20:13:06 +0100837
Bartlomiej Zolnierkiewiczdca39832009-05-17 19:12:24 +0200838 return ide_host_add(&cmd640_port_info, hws, second_port_cmd640 ? 2 : 1,
839 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840}
841
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100842module_param_named(probe_vlb, cmd640_vlb, bool, 0);
843MODULE_PARM_DESC(probe_vlb, "probe for VLB version of CMD640 chipset");
844
845module_init(cmd640x_init);
Adrian Bunk776c0bc2008-04-02 21:22:02 +0200846
847MODULE_LICENSE("GPL");